ev3dev.hardware.display

Class RGBFramebuffer

java.lang.Object

ev3dev.hardware.display.LinuxFramebuffer

ev3dev.hardware.display.RGBFramebuffer

All Implemented Interfaces:

JavaFramebuffer, java.io.Closeable, java.lang.AutoCloseable

public class RGBFramebuffer
extends LinuxFramebuffer

Linux XRGB 32bpp framebuffer

Since:

2.4.7

Constructor Summary

Constructors

Constructor and Description
RGBFramebuffer(NativeFramebuffer fb, DisplayInterface disp) Create and initialize new Linux RGB framebuffer.

Method Summary

Modifier and Type	Method and Description
java.awt.image.BufferedImage	createCompatibleBuffer(int width, int height) Create pixel-compatible buffer with a specified size.
java.awt.image.BufferedImage	createCompatibleBuffer(int width, int height, int stride, byte[] buffer) Create pixel-compatible buffer with a specified size and stride.
private int[]	getComponentOffsets() get color offsets, use the not-used-one for alpha

Methods inherited from class ev3dev.hardware.display.LinuxFramebuffer

clear, close, createCompatibleBuffer, createCompatibleBuffer, flushScreen, getBufferSize, getDevice, getDisplay, getFixedInfo, getHeight, getMemory, getStride, getVariableInfo, getWidth, initializeMemory, restoreData, setDeviceClose, setFlushEnabled, storeData

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RGBFramebuffer

public RGBFramebuffer(NativeFramebuffer fb,
                      DisplayInterface disp)
               throws LastErrorException,
                      java.lang.IllegalArgumentException

Create and initialize new Linux RGB framebuffer.

Parameters:

fb - The framebuffer device (e.g. /dev/fb0)

disp - Display manager (e.g. /dev/tty)

Throws:

LastErrorException

java.lang.IllegalArgumentException

Method Detail

createCompatibleBuffer

public java.awt.image.BufferedImage createCompatibleBuffer(int width,
                                                           int height)

Description copied from interface: JavaFramebuffer

Create pixel-compatible buffer with a specified size.

Specified by:

createCompatibleBuffer in interface JavaFramebuffer

Specified by:

createCompatibleBuffer in class LinuxFramebuffer

Parameters:

width - Requested image width.

height - Requested image height.

Returns:

BufferedImage with correct settings.

createCompatibleBuffer

public java.awt.image.BufferedImage createCompatibleBuffer(int width,
                                                           int height,
                                                           int stride,
                                                           byte[] buffer)

Description copied from interface: JavaFramebuffer

Create pixel-compatible buffer with a specified size and stride. This buffer will be backed by existing byte array.

Specified by:

createCompatibleBuffer in interface JavaFramebuffer

Specified by:

createCompatibleBuffer in class LinuxFramebuffer

Parameters:

width - Requested image width.

height - Requested image height.

stride - Requested scanline stride.

Returns:

BufferedImage with correct settings.

getComponentOffsets

private int[] getComponentOffsets()

get color offsets, use the not-used-one for alpha

Returns:

Offsets: { R, G, B, A }